Large Eddy Simulation of Premixed Swirling Flames with Thickened-Flame Model: a Sensitivity Study

被引：0
|
作者：
Wang P. [1 ]
Hou T.-Z. [2 ]
Yu Q. [2 ]
机构：
[1] Institute for Energy Research, Jiangsu University, Zhenjiang
[2] School of Energy and Power Engineering, Jiangsu University, Zhenjiang
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2018年 / 39卷 / 02期
关键词：
Large eddy simulation; Sensitivity study; Sub-grid combustion model; Thickened flame model;
D O I：
10.13675/j.cnki.tjjs.2018.02.014
中图分类号：
学科分类号：
摘要：
In order to analyze the effects of each parameter on the thickened-flame (TF) model, and find out the best range of each parameter in the this model, large eddy simulation (LES) of turbulent premixed swirling flames in the PRECCINSTA burner is performed with TF model. A sensitivity study of the model is conducted, for which several factors affecting the performance of TF model are investigated: the flame thickness grid number, the wrinkling function, a dynamic thickening procedure, etc.The investigation shows that the LES results obtained with the dynamic thickening procedure agree better with the experiment data. If the flame front is thickened to 10 times grid size, it becomes difficult for LES to predict the interaction between turbulence and flame correctly. For the flames under consideration in this paper, the ideal range of flame thickness grid number is 2.5 ~ 5. Furthermore, compared to the traditional Colin wrinkling function, the LES results obtained with power law wrinkling function with fixed index do not show a noticeable improvement. © 2018, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：358 / 365
页数：7
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